If used correctly, colour is a very effective tool that you can use to visually display data.
Colour can be used to encode extra meaning into your charts; however, it can become an issue if colour is used for no real purpose. Instead of splashing colour onto your charts for appeal, rather use colour so that various audiences are able to obtain relevant information.
Remember that no matter how well data is presented, if the data is not correct, it is useless. Using guided analytics, such as QlikView business intelligence software, will ensure that your data is organised and effective.